Synthetic Fiber HVAC Pockets Filter

Pocket filters are the most common air filters in HVAC systems for industrial and commercial applications as well as for residential use to improve indoor air quality and comfort. The filters in the supply air are used as first and second filter stages, either as complete filtration solutions for the applications or as pre-filters of cleanroom process applications. The filters are also used in the exhaust air or in the recirculation system to protect the air handling units. Pocket filters have a significantly higher dust holding capacity and longer lifetimes than other filters.


Arretance or Dust Sport EfficiencyUS ASHREA 52.2European Union EN779 Class

Typical Controlled Contaminant


PRE Filter (G Class)AFI<65%MERV 1G1Am<65%Particle bigger than 10.0µm (Pollen) (Spanish moss) (Dust mites) (Sanding Dust) (Spray paint dust) (Textile fibers)

Gross filter, domestic and commercial

AFI 65%-70%MERV 2G265%?Am<80%

AFI 70%-75%MERV 3

AFI 75%-80%MERV 4

AFI 80%-85%MERV 5G380%?Am<90%Paricle size within 3.0µm-10.0µm (Mold) (Spores) (Hair spray) (Cement dust) (Snuff) (Powdered milk)

Commercial, industrial, paint shop

AFI 85%-90%MERV 6

NBS 25%-30%MERV 7G490%?Am

NBS 30%-35%MERV 8

MEDIUM Filter (F Class)NBS 40%-45%MERV 9F540%?Em<60%Particle size within 1.0µm-3.0µm (Lead dust) (Milled flour) (Coal dust) (Auto emissions) (Nebulizer drop) (Welding fumes)

IAQ concerned medical, commercial & industrial

NBS 50%-55%MERV 10

NBS 60%-65%MERV 11F660%?Em<80%

NBS 70%-75%MERV 12

NBS 80%-85%MERV 13F780%?Em<90%Particle size 0.3µm-1.0µm (All bacteria) (cooking oil) (Most smoke) (Copier toner) (Most face powders) (Most paint pigments)

IAQ concerned commercial, industrial medical, food etc.

NBS 90%-95%MERV 14F890%?Em<95%

NBS>95%MERV 15F995%?Em